Ren'ya Koitsuda is a male Japanese voice actor whose professional work is primarily concentrated in adult-oriented media, including anime, games, and drama CDs. His career includes a notable role in the anime television series On a Lustful Night Mingling with a Priest, which aired in 2017, where he voiced the character Yukitaka Kujō. This series is a short-form adult romance anime based on a manga by Reon Maomi.

Beyond this anime appearance, Koitsuda has an extensive portfolio in the field of adult games and audio dramas. His video game credits include the title Slow Damage in 2021, as well as roles in games released in 2023 such as 欲與君戀-PLUSMATE- and What in Hell is Bad?. He continued this work in 2024 with a role in 夢幻楼と眠れぬ蝶.

Koitsuda has been particularly prolific in the production of broadcast dramas, or drama CDs. His work in this medium spans several years, with multiple credits in 2021, 2022, 2023, 2024, and 2025. Examples of his drama CD roles include Rintaro Minesawa in Curupire Salon in 2020, Shoya in The Hidden ~Crazy Blood~ in 2021, Fumiya Sakamaki in S-Kareshi no Ijiwaru Ecchi in 2022, and Konjin Okamiyama in Rudolph -YELLOW- in 2023. His 2025 work includes the part of Isami Kondo in the drama Bakumatsu Kareshi! ~Nikushoku Shinsengumi~.